Denso part number 234-9049 is a replacement wide-band Air/Fuel Ratio Sensor with 4 wire 20.08 inch long wiring harness for: Lexus: (2007 ES350, 2007 & 2010-2011 RX350, 2010 RX450h) Scion: (2005-2010 tC, 2008-2015 xB) Toyota: (2005-2007 Avalon, 2003-2011 Camry, 2001-2003 Highlander, 2003-2012 RAV4, 2007-2010 Sienna, 2004-2008 Solara) Denso Air/Fuel Ratio Sensors are manufactured and tested to the strictest OE standards for unparalleled performance. Each component is precision-built for exact replacement, and a first time fit. The superior design of Denso Air/Fuel Ratio Sensors maximizes engine performance and fuel efficiency while reducing fuel consumption and harmful emissions. Denso Air/Fuel Ratio Sensors increase performance by mapping air/fuel ratios throughout the RPM range. They also reduce emissions by keeping the air-fuel mixture at an optimum ratio. Optimal air/fuel ratios reduce fuel consumption and maximize catalytic converter life. Denso gives you the right part and the right fit, the first time.